The evaluation of early reproduction traits in Beetal goat was performed for possible effects of genetic and non-genetic factors on litter size at birth (LSB), litter size at weaning (LSW), litter weight at birth (LWB), litter weight at weaning (LWW) and age at first kidding (AFK). The data records consisted of information of pedigree and targeted traits pertained to 223 does born to 25 sires and 122 dams between the years 2004 to 2019. A general linear model was used for assessment of non-genetic factors such as period of birth, type of birth and dam’s weight at kidding on studied traits. Genetic evaluation of targeted traits was done to estimate variance components and genetic parameters under dyadic mixed modelling. The estimates of least-square means for LSB, LSW, LWB, LWW and AFK were observed as 1.27 ± 0.03, 1.25 ± 0.03, 3.24 ± 0.07 kg, 13.08 ± 0.30 kg and 27.56 ± 0.58 months, respectively. Only the period of birth showed significant (P < 0.05) effects for targeted traits in this study. The estimates of direct heritability for LSB, LSW, LWB, LWW and AFK were low in magnitude as 0.08, 0.03, 0.10, 0.03 and 0.06, respectively. The moderate to high genetic and phenotypic correlations among litter traits indicate simultaneous improvement for these traits. It was concluded that low ranged direct heritability estimates for targeted traits indicated modest scope for genetic improvement of reproductive efficiency in Beetal goat through selection and, therefore, adoption of improved managerial practices is necessary to improve reproductive efficiency of Beetal goat.

对甜菜山羊的早期繁殖性状​​进行了评估，以了解遗传和非遗传因素对出生时产仔数 (LSB)、断奶时产仔数 (LSW)、出生时产仔数 (LWB)、断奶时产仔数的可能影响（LWW）和第一次开玩笑的年龄（AFK）。数据记录包括 2004 年至 2019 年间与 25 只公牛和 122 只母鸡所生的 223 只母牛相关的谱系和目标性状信息。使用一般线性模型评估出生时间、类型等非遗传因素。在研究性状上开玩笑时出生和母亲的体重。对目标性状进行遗传评估，以估计二元混合建模下的方差分量和遗传参数。LSB、LSW、LWB、LWW 和 AFK 的最小二乘均值估计值为 1.27 ± 0.03、1.25 ± 0.03、3.24 ± 0.07 kg、13。分别为 08 ± 0.30 公斤和 27.56 ± 0.58 个月。只有出生时期显示显着（P < 0.05) 对本研究中目标性状的影响。LSB、LSW、LWB、LWW 和 AFK 的直接遗传力估计值分别为 0.08、0.03、0.10、0.03 和 0.06。窝窝性状之间的中度至高度遗传和表型相关性表明这些性状同时得到改善。得出的结论是，目标性状的低范围直接遗传力估计表明，通过选择对甜菜山羊繁殖效率的遗传改进范围不大，因此，采用改进的管理实践对于提高甜菜山羊的繁殖效率是必要的。